juhasev
Cadet
- Joined
- Jul 8, 2011
- Messages
- 9
I bought my boats with 45 hours on it and at 350 hours I have two cracked heads and water in the oil (cracked in exhaust valve seats). After inspecting the heads they don't appear to be marine heads which to my knowledge should always have steel re-enforced valve seats. Also the combustion chamber appears to be a slightly larger than in the marine heads potentially leading into HP loss. So my question is what is the correct head? Did Mercruiser sell heads without the steel re-enforced valve seats or did somebody at some point replace my boats engines and cheap skated putting in wrong heads?
I have attached picture of my heads and Sierra Vortec cylinder head with steel reinforced valve seats (see the difference in combustion chamber)
Has anybody used Sierra heads? I would assume they would work as good as the Mercruiser equivalents. After all they are probably all using the same casting....
Any help would be appreciated!
Thanks, Juha
I have attached picture of my heads and Sierra Vortec cylinder head with steel reinforced valve seats (see the difference in combustion chamber)
Has anybody used Sierra heads? I would assume they would work as good as the Mercruiser equivalents. After all they are probably all using the same casting....
Any help would be appreciated!
Thanks, Juha
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